diff options
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c index b61355e2a771..252b74633e31 100644 --- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c +++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c @@ -1526,8 +1526,31 @@ static struct omap_hwmod dra7xx_ocp2scp3_hwmod = { * */ +/* + * As noted in documentation for _reset() in omap_hwmod.c, the stock reset + * functionality of OMAP HWMOD layer does not deassert the hardreset lines + * associated with an IP automatically leaving the driver to handle that + * by itself. This does not work for PCIeSS which needs the reset lines + * deasserted for the driver to start accessing registers. + * + * We use a PCIeSS HWMOD class specific reset handler to deassert the hardreset + * lines after asserting them. + */ +static int dra7xx_pciess_reset(struct omap_hwmod *oh) +{ + int i; + + for (i = 0; i < oh->rst_lines_cnt; i++) { + omap_hwmod_assert_hardreset(oh, oh->rst_lines[i].name); + omap_hwmod_deassert_hardreset(oh, oh->rst_lines[i].name); + } + + return 0; +} + static struct omap_hwmod_class dra7xx_pciess_hwmod_class = { .name = "pcie", + .reset = dra7xx_pciess_reset, }; /* pcie1 */ |